1. Standard methods for the examination of water and sewage;APHA,1925
2. Standard methods for the examination of waste and wastewater;APHA,1965
3. Standard methods for the examination of waste and wastewater;APHA,1971
4. Acid precipitation and forest growth in the northeastern United States;Cogbill,1975
5. The history and character of acid precipitation in eastern North America;Cogbill;Wat. Air Soil Pollut.,1976